Pouch area marking control for pouch packaging machines



Mardl 6 F. M. WILLBRANDT 25,736

POUCH AREA MARKING CONTROL FOR POUCH PACKAGING MACHINES ori i al-FiledMarch 9, 1%;v a Sheet s-Sheet 1 mmvrox POUCH AREA MARKING CONTROL FORPOUCH PACKAGING MACHINES Original Filed March 9, 1961 5 Sheets-Sheet 2JOA a Jmn/r/in M VVM/b/and/ l3 4 ijiym M MM AT TORNEY 9 g uf A F? Emmvrox March 2, 1965 F. M. WILLBRANDT 25,736

POUCH AREA MARKING CONTROL FOR POUCH PACKAGING MACHINES Original FiledMarch 9, 1961 3 Sheets-Sheet I5 \f 43 6 I H| 7- r I WI F I 72 7 1 BY@WM1ATTORNEY United States Patent ()filice Re. 25,736 Reissued Mar. 2, 196525,736 POUCH AREA MARKING CONTROL FOR POUCH PACKAGING MACHINES FranklinM. Willbrandt, Battle Creek, Mich, assignor to Battle Creek PackagingMachines, Incorporated, Battle Creek, Mich.

Original No. 3,075,328, dated Jan. 29, 1963, Ser. No. 94,578, Mar. 9,1961. Application for reissue Sept. 2, 1964, Ser. No. 405,316

13 Claims. (Cl. 53--51) Matter enclosed in heavy brackets 1 appears inthe original patent but forms no part of this reissue specification;matter printed in italics indicates the additions made by reissue.

This invention relates to improvements in [pouch area marking controlfor pouch packaging machines] electrically adjusted pouch length marker.The principal objects of this invention are:

First, to provide a pouch packaging machine of the type which receivesarticles to be packaged on a continuously advancing web of packagingmaterial and thereafter encloses the articles in a pouch formed of thepackaging material with means for marking the incoming web of materialto indicate the article receiving areas and for quickly and accuratelyadjusting the marking means to define a variety of difierent pouch areasin registry with the pouch forming elements of the machine.

Second, to provide adjustable control means for regulating the frequencyof actuation of the pouch type packaging machine and for separatelyactuating the adjustable pouch area marking device cooperative with theinfeeding web of packaging material so that the length of the pouchformed by the machine can be easily adjusted along with the speed withwhich the pouches are formed.

Third, to provide a pouch type wrapping machine with means for adjustingthe frequency of actuation of the pouch forming means relative to thefrequency of a pouch area marking device and for further adjusting theposition at which the pouch forming means will operate linearly withrespect to the pouch area indicia marked on the web of wrappingmaterial.

Fourth, to provide a continuous pouch type packaging machine which caneasily and rapidly be adjusted to package a wide variety of ditferentshapes and length of articles.

Other objects and advantages of the invention will be apparent from aconsideration of the following description and claims. The drawings, ofwhich there are three sheets, illustrate a highly practical form of thepouch length adjusting mechanism of a pouch type packaging machine.

FIG. 1 is a fragmentary side elevational view of a pouch type packagingmachine with the pouch length adjusting mechanism incorporated therein.

FIG. 2 is a fragmentary enlarged side elevational view of the oppositeside of the packaging machine from FIG. 1 illustrating the drivingconnections to the several parts of the machine.

FIG. 3 is a fragmentary enlarged plan view of the pouch area printercontrol, the view being taken generally along the plane of the line 33in FIG. 2.

FIG. 4 is a fragmentary cross sectional view through the printer controltaken along the plane of the line 44 in FIG. 3.

FIG. 5 is a fragmentary top plan view of the pouch forming control takenalong the plane of the line 5-5 in FIG. 2.

FIG. 6 is a fragmentary vertical cross sectional view taken along theplane of the line 66 in FIG. 5 and illustrating the mechanism foradvancing and retracting the time of actuation of the pouch formingmechanism relative to the pouch area marking mechanism.

FIG. 7 is a schematic wiring diagram of the electrical controls of themachine.

FIG. 8 is a fragmentary vertical cross sectional view through the offfeeding conveyor of the packaging machine illustrating the adjustingcontrols and the pouch forming mechanism of the machine.

The pouch packaging machine so far as the pouch forming and sealingelements thereof are concerned, is of the type disclosed in theco-pending application, Serial No. 848,250 filed October 23, 1959, nowPatent Number 2,- 996,860 for Pouch Area Marker and Pouch PackagingMachines. Only so much of the structure of the pouch forming mechanismwill be described as is necessary to explain the relationship of theadjustable control mechanism relative thereto. As appears generally inFIGS. 1 and 8, the machine consists of suitable frame elements 1--1supporting an infeeding conveyor 2 and a pouch forming, sealing andsevering mechanism enclosed in the case 3. An off feeding conveyor 4 forthe packaged articles delivers from the opposite side of the machine.

A continuous bottom web 5 of packaging material is drawn in from thesupply roll 6 along the infeeding conveyor. The web 5 passes under anelectrically actuated printing device 7 having a solenoid 8 arranged toimprint any desired indicia on the web at the infeeding end conveyor. Itwill be appreciated that by timing the actuation of the solenoid 8relative to the rate of travel of the conveyor 2 and web 5 a series ofpackaging or pouch areas can be created on the web 5 and operators mayplace articles A to be packaged on the conveyor at the properlyindicated areas on the web as the web is advanced to the pouch formingmechanism 3.

Within the pouch forming mechanism 3 there are provided pairs of upperside sealing rolls 9 and lower side sealing rolls 10 which are rotatedin sealing and crimping engagement with the side edges of the infeedingweb 5. In the example illustrated a top sealing web 11 is drawn inwardlyfrom the supply roll 12 and sealed to the bottom web 5 over the articlesplaced on the bottom web.

After the top and bottom packaging webs have been sealed together onopposite sides of the articles the web is advanced to the right as shownin FIG. 1 and to the left as shown in FIG. 2. In order to seal the twowebs transversely between the articles A and if desired to sever the webinto separate pouches, the web is advanced between parallel uprightrocker arms 13 which are pivoted below the conveyors 2 and 4 on a camshaft 14. The rocker arms form slides or guides ways for slide members15 supporting a transverse sealing bar 16 and knife 17. The sealing barand knife coact with an abutment 18 carried between the rocker arms insupporting relation to the sealed webs being delivered from the rollers9 and 10. In their lower ends the slide members 15 carry cam followers19 which are engaged and actuated by cams 20 on the cam shaft to raiseand lower the sealing bar 16 and knife 17 The upper ends of the rockerarms 13 are oscillated forwardly and rearwardly by sprockets 21 havingcrank pins 22 engaging the rocker arms and the sprockets 21 are drivenin timed relationship with the cam 20 by a chain 23 driven from the camshaft 14 so that the slide and knife 17 descend when the rocker arm isadvanced to the left in FIG. 2 to sever a newly formed pouch and retractupwardly as the support 18 retracts under the incoming web and articles.

In order to provide for a wide variety of timing adjustments between thespeed of the feeding conveyor 2, the frequency of the actuation of theprinter 7 and the frequency of the actuation of the slides 15 and therocker arms 13, separate driving connections are provided to the camshaft 14 and to the infeeding conveyor 2 and to the side sealing rolls 9and 10. The cam shaft 14 is driven by a chain 123 from an electricallyactuated one revolution clutch 24 having a control solenoid 25. Thedriven part of the one revolution clutch is continuously driven by achain 26 from a speed reduction transmission 27 and motor 28 shownconventionally in FIG. 1.

The transmission 27 also drives a chain 29 driving a main drive shaft36. On the side of the machine shown in FIG. 1 the shaft 30 drives aselectively interchangeable gear 31 engaged with a second selectivelyinterchangeable gear 32 mounted on the crank plate 33. The gear 32meshes with a gear 34 which drives the chain 35 to the infeedingconveyor 2. By selecting the desired gear ratio between the gears 31 and32 and adjusting the crank plate 33 to mesh the gears, the speed of theinfeedin g conveyor 2 may be adjusted.

The shaft 30 also drives a chain 36 appearing in FIG. 2 to drive theselectively interchangeable gear 37 which meshes with a selectivelyinterchangeable gear 38 carried on the crank plate 39. The gear 38drives through a pinion 40 to the gear 41 and through a connected chain42 to the lower sealing rolls 16. The speed of the slide sealing rolls 9and 19 can thus be adjusted to the same speed as the infeeding conveyor2.

In order to provide additional adjustment of the speed of the sidesealing rolls relative to the timing of the transverse sealing bar 16and to variably actuate the printing device 7, the drive shaft 30continuously drives a chain 43 trained over the sprocket 44 and thesprocked 45. The sprocket 44 drives a first selective switch operatingtransmission generally indicated at 46 in FIG. 2, and a second selectiveswitch actuating transmission generally indicated at 47 is driven by thesprocket 45. The switch transmission 46 constitutes a variable frequencyswitching device and functions as will be described in greater detailpresently to actuate the solenoid 25 of the one revolution clutch andinitiates a sealing and severing cycle of the rocker arms 13 and sealingbar 16. The transmission 47 constitutes a second and independentlyadjustable variable frequency switching device and functions to actuatethe solenoid 8 of the printer 7 at selectively timed intervals as willbe described.

The printer actuating transmission and the electrical connectionsthereto is best illustrated in FIGS. 3, 4 and 7 which illustrate thechain 43 to be drivingly connected to a shaft 48 having a plurality ofdifferent sized gears 49A, 49B, 49C, 49D and 4913 drivingly connectedthereto. The gears 49 continuously mesh with mating gears 59A,5013,.500, 50D and 50B which necessarily vary in size inversely with thegears 49. The gears 49E and 50E are of equal size for a 1 to 1 drivingratio. Each of the gears 50A through E carry a disc 51 With a tappet 52projecting therefrom and the several tappets 52 are arranged to trip andclose electrical switches 53 mounted on supports 54 below and betweenthe gears 49 and 50. As is shown most clearly in the circuit diagram ofFIG. 7 the switches 53A through E are connected on one side in parallelto the solenoid 8 of the printer. On their other sides the switches 53are connected separately to the terminals 55 of a selector switch 56having an adjustable contact 57. By adjusting the switch 56 and itscontact 57, the printer 7 may be actuated at different speeds orfrequencies relative to the infeeding speed of the conveyor 2 and thebottom web 5. This will obviously create pouch areas of differentlengths on the web 5 which can be made to correspond to the length ofarticles which it is desired to package.

The rocker arms 13 and transverse sealer and cutter l617 are actuated aspreviously described through one cycle of operation on each actuation ofthe solenoid 25 of the one revolution clutch 24. The solenoid 25 isselectively actuated by the transmission 46 driven concurrently with thetransmission 47 by the sprocket 44. The transmission 46 is shown indetail in FIGS. 5 and 6 wherein a first series of gears 58A, 583 etc.are drivingly mounted on a shaft 59 and meshed with mating gears 60A,60B etc. on the shaft 61. The shafts 59 and 61 are carried by suitablebrackets 62 above the sprocket 44. The gears 69A, B etc. each carry adisc 63 having a pawl 64 thereon arranged to contact and close a switch65A or B etc. As is shown in the wiring diagram FIG. 7 one side of theswitches 65 are connected in parallel to the solenoid 25 while the othersides of the switches are connected separately to the selectiveterminals 66 of a selective switch 67 having a moveable contact 68. Byadjusting the contact 68 the solenoid 25 and the transverse sealer andcutter actuated thereby can be made to operate at various frequenciesrelative to the actuation of the printer 7. For example, the transversesealer can be set to operate between every printed indicia at theseveral different spacings available with the switch 56 or thetransverse selector can be made to operate between every other printedindicia. This permits a wide range of adjustments of the pouch lengthscreated by the machine.

Without further structure the transverse sealer and cutter would operateat a given position on the web relative to the printed indicia due tothe simultaneous and equal speed of the transmission 46 and 47. However,in order to permit adjustment of the cut-off position longitudinally ofthe Web relative to the indicia marks a dilierential drive is providedbetween the chain 43 and the shaft 59. This constitutes a phase relationadjustmen! between the first adjustable frequency switch device formedby the switch operating transmission 46 and the second adjustablefrequency switching device formed by the switch operating transmission47. This differential drive shown in FIGS. 5 and 6 consists of a gear 69driven by gear 169 which is connected to the coaxial sprocket 44 andchain 43. The gear 69 is connected by a sleeve 70 to a bevel gear '71surrounding the shaft 59 and rotatable relative thereto. Positionedaround the bevel gear 71 is a combined ring gear and carrier 72 having apair of planetary gears 73 mounted on stub shafts perpendicular to theshaft 59. The bevel gears 73 mesh with the bevel gear 71 and also with afourth bevel gear 74 pinned to the shaft 59.

By a Well known differential action rotation of the gear 69 and bevelgear 71 is transmitted through the bevel gears 73 to the bevel 74 andshaft 59 at a fixed ratio so long as the ring gear and carrier 72 isheld stationary. In order to introduce a differential drive and advanceor retard the rotation of the shaft 59 relative to the chain 43 and theprinter transmission, a worm gear 75 carried by brackets 76 is meshedwith the ring gear 72 and connected by means of a flexible shaft 77 to acontrol crank 78 mounted on the side of the machine above the switches56 and 67. The crank 73 may conveniently have a counter 79 associatedtherewith which registers the number of turns imparted to the worm 75and indicates the extent to which the ring gear 72 has been advanced orretarded relative to the gear 69 and the printer transmission.

The printer transmission 47 and selector switch 56 and the sealertransmission 46 and selector switch 67 provide a wide range of possibleadjustments of the pouch length formed by the machine. It will beappreciated that as many gears and switches may be provided in eachtransmission as is desired. In addition the nurnber of possible pouchlength adjustments can be further multiplied with each additional set ofinterchangeable gears 37-38 and 29-32 provided with the machine. In anyselected position of pouch length adjustment the location of thetransverse seal can be adjusted relative to the pouch area indicatingindicia by manipulation of the crank 78. It is accordingly practical touse the same machine for packaging a wide variety of sizes of articles Aas the pouch length can be quickly adjusted to accommodate one size ofarticle after a number of a different size. article have, been packaged.

What is claimed as new is: 1. In a pouch type packaging machine havingmeans for receiving articles on a continuously advanced web of wrappingmaterial and forming a pouch package around the articles including meansfor transversely sealing and cutting the web after the sides of thepouch are sealed,

adjustable means for indicating different pouch areas on said web andfor actuating the means for sealing and severing the web between saidpouch areas comprising a first drive including an interchangeable set ofgears connected to advance and longitudinally seal the sides of said webat different speeds,

a printer positioned to operate on the incoming Web and having anelectrically actuated control connected to operate the printer,

a second drive including a one revolution clutch connected to actuatesaid transverse sealer and cutter,

a printer actuating transmission including plural switches actuated atdifferent frequencies and each connected to the control of said printer,

a selector switch connected to selectively energize one of the switchseof said printer transmission to said printer control,

sealer and cutter actuating transmission driven in timed relationship tosaid printer transmission and including a plurality of switches actuatedat different frequencies and connected to actuate said clutch,

a second selector switch having a plurality of contacts connected toselectively energize said switches of said sealer transmission,

a differential drive connected between said sealer transmission and saiddrive to said transmissions whereby the times of closing the switches insaid sealer transmission may be advanced and retarded relative to thetime of closing of the selected switch in said printer transmission,

said differential connection including an adjusting crank operable fromthe exterior of the machine and having a visible counter dial recordingthe number of advancing and retracting rotations of the adjustingelement of the differential connection.

2. In a pouch type packaging machine having means for receiving articleson a continuously advanced web of wrapping material and forming a pouchpackage around the articles including means for transversely sealing andcutting the web after the sides of the pouch are sealed,

adjustable means for indicating different pouch areas on said web andfor actuating .the means for sealing and severing the web between saidpouch areas comprising a first drive connected to advance andlongitudinally seal said web,

a printer positioned to operate on the incoming web and having anelectrically actuated control connected to operate the printer,

a second drive including a one revolution clutch con nected to actuatesaid transverse sealer and cutter,

a printer actuating transmission including plural switches actuated atdifferent frequencies and each connected to the control of said printer,

a selector switch connected to selectively energize one of the switchesof said printer transmission to said printer control,

a sealer and cutter actuating transmission driven in timed relationshipto said printer transmission and including a plurality of switchesactuated at different frequencies and connected to actuate said clutch,

a second selector switch having a plurality of contacts connected toselectively energize said switches of said sealer transmission,

a differential drive connected between said sealer transmission and saiddrive to said transmissions whereby the times of closing the switches insaid sealer transmission may be advanced and retarded relative to thetime of closing of the selected switch in said printer transmission,

said differential connection including an adjusting crank operable fromthe exterior of the machine.

3. In a pouch type packaging machine having means for continuouslyadvancing a web of wrapping material and forming a pouch package aroundarticles placed on the web including means for transversely sealing andcutting the web after the sides of the pouch are sealed,

adjustable means for indicating different pouch areas on said web andactuating the means for sealing and severing the web between said pouchareas comprising a first drive connected to advance and longitudinallyseal said web at different speeds,

a printer positioned to operate on the incoming web and having anelectrically actuated control connected to operate the printer,

:1 second intermittent drive including a one revolution clutch connectedto actuate said transvers sealer and cutter,

a printer actuating transmission including plural switches eachconnected to the control of said printer,

a selector switch connected to selectively connect one of the switchesof said printer transmission to said printer control,

a sealer and cutter actuating transmission driven in timed relationshipto said printer transmission and including a plurality of switchesactuated at different frequencies and connected to actuate said clutchof said intermittent drive,

a second selector switch having a plurality of contacts connected toselectively energize said switches of said sealer transmission,

and a differential drive connected between said sealer transmission andsaid drive to said transmissions whereby the times of closing theswitches in said sealer transmission may be advanced and retardedrelative to the time of closing of the selected switch in said printertransmission.

4. In a pouch type packaging machine having means for continuouslyadvancing a web of Wrapping material and forming a pouch package aroundarticles placed on the web including means for transversely sealing theweb after the sides of the pouch are sealed,

adjustable means for indicating different pouch areas on said web andactuating the means for sealing the web between said pouch areascomprising a first drive connected to advance said web,

a printer positioned to operate on the incoming web and having anelectrically actuated control connected to operate the printer,

a second intermittent drive connected to actuate said transverse sealer,

a printer actuating transmission including plural switches eachconnected to the control of said printer,

a selector switch connected to selectively connect one of the switchesof said printer transmission to said printer control,

a sealer and cutter actuating transmission driven in timed relationshipto said printer transmission and including a plurality of switchesactuated at different frequencies and connected to actuate saidintermittent drive,

a second selector switch having a plurality of contacts connected toselectively energize said switches of said sealer transmission,

and a differential drive connected between said drive to said printertransmission and said sealer transmission whereby the times of closingthe switches in said sealer transmission may be advanced and retardedrelative to the time of closing of the selected switch in said printertransmission.

5. In a pouch type packaging machine having means for continuouslyadvancing a web of Wrapping material and forming a pouch package aroundarticles placed on the web including means for transversely sealing theweb,

adjustable means for indicating different pouch areas on said web andactuating the means for sealing the web between said pouch areascomprising a first drive connected to advance said web at diiferentspeeds,

a printer positioned to operate on the incoming web and having anelectrically actuated control connected to operate the printer,

a second intermittent drive having an electrically controlled actuatingelement and connected to actuate ated at different frequencies byoperation of the transmission,

a first selector switch connected to selectively render one of saidtransmission switches eifective to actuate said marking means,

a second electrically actuated means for actuating said transversesealing means,

a second transmission having a plurality of switches actuated atdilferent frequencies by operation of the said means for transverselysealing said web, 10 transmission,

a printer actuating transmission including plural a second selectorswitch connected to selectively render switches each connected to thecontrol of said printer, one of the switches of said second transmissionefa selector switch selectively connectable in series with fective toactuate second electrically actuatedmeans,

one of the switches of said printer transmission to and means connectedto drive said transmission simulrender said one switch operative,taneously in timed relation with said conveyor,

a sealer actuating transmission driven in timed rethere being adifferential drive connection with a manlationship tosaid printertransmission and including ually operable control interposed between oneof said a plurality of switches actuated at diiferentfrequentransmissions and said last drive means to advance cies andconnected to said actuating element of said and retract the rotation ofsaid transmissions relative intermittent drive, to each other.

a second selector switch selectively connectable in 8. A pouch packagingmachine comprising means for series with one of the switches of saidsealer transadvancing a web of wrapping material over a loading missionto render said one sealer transmission switch conveyor and forming apouch over articles placed on operative, the web,

and a differential drive connected between said drive means fortransversely sealing said pouch,

to one of said transmissions and the transmission electrically actuatedmarking means positioned to mark whereby the times of closing theswitches of the pouch area indicating marks on said web at the beonetransmission may be advanced and retarded ginning of said conveyor,relative to the time of closing of the selected switch a firsttransmission having a plurality of switches actuin the othertransmission, ated at different frequencies by operation of thetranssaid differential connection including a crank operable from theexterior of the machine. 6. In a pouch type packaging machine havingmeans for mission,

21 first selector switch connected to selectively render one of saidtransmission switches eiiective to actuate said marking means,

continuously advancing a web of wrapping material and forming a pouchpackage around articles placed on the web including means fortransversely sealing the web,

a second electrically actuated means for actuating said transversesealing means,

a second transmission having a plurality of switches actuated atdifferent frequencies by operation of the transmission,

a second selector switch connected to selectively render one of theswitches of said second transmission ef fective to actuate secondelectrically actuated means,

and means connected to drive said transmissions simultaneously in timedrelation with said conveyor,

there being a diiferential drive connection interposed between one ofsaid transmissions and said last drive means to advance and retract therotation of said transmissions relative to each other.

9. A pouch packaging machine comprising means for ter, selector switchselectively connectable in series with advancing a web of wrappingmaterial over a loading conveyor and forming a pouch over articlesplaced on the Web,

one of the switches of said printer transmission to render said one"switch operative, a sealer actuating transmission driven in timedremeans for transversely sealing said pouch,

electrically actuated marking means positioned to mark pouch areaindicating marks on said web at the beginning of said conveyor,

a first transmission having a plurality of switches actumeans fortransversely sealing said pouch, electrically actuated marking meanspositioned to mark lationship to said rinter transmission and includingpouch area indicating marks on said web at the bea plurality of switchesactuated at different frequenginning of said conveyor, cies andconnected to said actuating element of a first transmission having aplurality of switches actusaid intermittent drive, ated at diflierentfrequencies by operation of the transa second selector switchselectively connectable in mission,

series with one of the switches of said seal r tr-ansa first selectorswitch connected to selectively render one mission to render said onesealer transmission switch of said transmission switches effective toactuate said operative, and a differential drive connected betweenmarking means, said drive to one of said transmissions and the transasecond electrically actuated means for actuating said mission wherebythe times of closing the switches of transverse sealing means, the onetransmission may be advanced and retarded a second transmission having aplurality of switches relative to the time of closing of the selectedswitch actuated at different frequencies by operation of the in theother transmission. transmission, 7. A pouch packaging machinecomprising means for a second selector switch connected to selectivelyrender advancing a web of wrapping material over a loading conone of theswitches of said second transmission efyeyor and forming a pouch overarticles placed on the web, fective to actuate second electricallyactuated means,

and means connected to drive said transmissions simulfor receivingarticles on a continuously advanced web of wrapping material and meansfor forming pouch packages including said web around the articles andmeans for transversely sealing and cutting the web after the packageshave been formed,

adjustable means for indicating difierent length pouch areas on said weband for actuating the means for forming the packages and cutting the webcomprising,

means connected to drive said package forming means and to advance saidweb in timed relation,

a printer positioned to operate on the incoming web adjacent theinfeeding end thereof and having an electrically actuated controlconnected to operate the printer,

means including a one revolution clutch connected to drive said meansfor transversely sealing the web,

a second electrically actuated control connected to engage said clutch,

a first variable frequency switching device connected to saidelectrically actuated control for operating said printer,

a second variable frequency switching device connected to activate saidsecond electrically actuated control,

and means connected to simultaneously advance said first and secondvariable frequency devices at equal increments of their switchingfrequencies,

said means for advancing said variable frequency devices including adifierential drive to one of said variable frequency switching devicesto change the phase relation of advance of said devices.

11. In a pouch type packaging machine having means for receivingarticles on a continuously advanced web of wrapping material and meansfor forming pouch packages including said web around the articles andmeans for transversely sealing the web after the packages have beenformed,

adjustable means for indicating difierent length pouch areas on said weband for actuating the means for forming the packages comprising,

means connected to drive said package forming means and to advance saidweb in timed relation,

a printer positioned to operate on the incoming web adjacent theinfeeding end thereof and having an electrically actuated controlconnected to operate the printer,

means including a one revolution clutch connected to drive said meansfor transversely sealing the web,

a second electrically actuated control connected to engage said clutch,

a first variable frequency switching device connected to saidelectrically actuated control for operating said printer, i

a second variable frequency switching device connected to activate saidsecond electrically actuated control, and means connected tosimultaneously advance said first and second variable frequency devicesat equal increments of their switching frequencies.

12. In a pouch packaging machine having means for delivering a web ofpouch forming material and pouch sealing means acting on the web totransversely seal the web into pouches at intervals,

a pouch area marker positioned to operate on the web at the infeedingend thereof and having an eletcric'al control connected to actuate themarker,

a second electrical control connected to actuate the pouch sealingmeans,

and a pair of variable frequency switching devices each drivenconcurrently in timed relation to said means for delivering said web andeach connected to activate one of said controls at separately selectedintervals,

one of said switching devices being adjustably connected to said meansfor delivering the web to vary the phase relation between said switchingdevices.

13. In a pouch packaging machine having means for delivering a web ofpouch forming material and pouch sealing means acting on the web totransversely seal the web into pouches at intervals,

a pouch area marker positioned to operate on the web at the infeedingend thereof and having an electrical control connected to actuate themarker,

a second electrical control connected to actuate the pouch sealingmeans,

and a pair of variable frequency switching devices each drivenconcurrently in timed relation to said means for delivering said web andeach connected to activate one of said controls at separately selectedintervals.

References Cited by the Examiner 4 The following references, cited bythe Examiner are of record in the patented file of this patent or theoriginal patent.

UNITED STATES PATENTS 2,578,799 12/51 Grey.

2,611,225 9/52 Williams. 2,871,639 2/59 Forgo. 2,996,860 8/61Willbranclt.

FRANK E. BAILEY, Primary Examiner,

